package com.zhang.springcloud.alibaba.controller;

import com.alibaba.csp.sentinel.annotation.SentinelResource;
import com.alibaba.csp.sentinel.slots.block.BlockException;
import com.zhang.springcloud.alibaba.service.PaymentService;
import com.zhang.springcloud.entities.CommonResult;
import com.zhang.springcloud.entities.Payment;
import lombok.extern.slf4j.Slf4j;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

import javax.annotation.Resource;

@RestController
@Slf4j
public class CircleBreakerController {
    public static final String SERVICE_URL = "http://nacos-payment-provider";

    @Resource
    private RestTemplate restTemplate;

    @RequestMapping("/consumer/fallback/{id}")
    //@SentinelResource(value = "fallback")       //没有配置
    //@SentinelResource(value = "fallback",fallback = "handlerFallback")  //fallback只负责业务异常
    //@SentinelResource(value = "fallback",blockHandler = "blockHandler")   //blockHandler只负责sentinel控制台配置违规
    @SentinelResource(value = "fallback",fallback = "handlerFallback",blockHandler = "blockHandler",
            exceptionsToIgnore = {IllegalArgumentException.class})
    public CommonResult<Payment> fallback(@PathVariable Long id){
        CommonResult<Payment> result = restTemplate.getForObject(SERVICE_URL+"/paymentSQL/"+id,CommonResult.class,id);
        if(id == 4){
            throw new IllegalArgumentException("IllegalArgumentException,非法参数异常.......");
        }else if(result.getData() == null){
            throw new NullPointerException("NullPointerException,该ID没有对应记录，空指针异常");
        }
        return result;
    }


    //本例是fallback
    public CommonResult handlerFallback(@PathVariable Long id,Throwable e){
        Payment payment = new Payment(id,"null");
        return new CommonResult<>(444,"兜底异常handlerFallback,exception内容 "+e.getMessage(),payment);
    }

    //本例是blockHandler
    public CommonResult blockHandler(@PathVariable Long id, BlockException blockException){
        Payment payment = new Payment(id,"null");
        return new CommonResult<>(445,"blockHandler-sentinel限流,无此流水：blockException "+blockException.getMessage(),payment);
    }

    //===================OpenFeign
    @Resource
    private PaymentService paymentService;

    @GetMapping(value = "/consumer/paymentSQL/{id}")
    public CommonResult<Payment> paymentSQL(@PathVariable("id") Long id){
        return paymentService.paymentSQL(id);
    }

}
